Measurement of the CP Asymmetry in Semimuonic B Decays Produced in Proton-Antiproton Collisions at Center of Mass Energy= 1.96 TeV

Marino, Christopher Phillip

Permalink

https://hdl.handle.net/2142/80563 Copy

Description

Title

Measurement of the CP Asymmetry in Semimuonic B Decays Produced in Proton-Antiproton Collisions at Center of Mass Energy= 1.96 TeV

Author(s)

Marino, Christopher Phillip

Issue Date

2007

Doctoral Committee Chair(s)

Kevin Pitts

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

Physics, Elementary Particles and High Energy

Language

eng

Abstract

We measure the asymmetry between positive and negative same-sign muon pairs originating from semileptonic decays of pairs of B hadrons. Low transverse momentum dimuon pairs are evaluated to determine B hadron content using a log likelihood fit to two-dimensional impact parameter significance templates. Corrections are made for asymmetries arising from the detector, trigger, and hadrons which are reconstructed as muons. Using 1.1 million muon pairs from data corresponding to an integrated luminosity of 1.6 fb-1, we find 210,000 same-sign muon pairs with both muon candidates coming from B decays. After corrections, we measure a semileptonic asymmetry from neutral B mixing of ASL = 0.0080 +/- 0.0090( stat) +/- 0.0068(syst). This asymmetry can be interpreted as a constraint on the complex phase of the CKM matrix element Vts by using the B0 neutral mixing contribution measured at the B factories. We measure the CP violating asymmetry from Bs mixing to be AsSL = 0.020 +/- 0.028.

Graduation Semester

2007

Type of Resource

text

Permalink

http://hdl.handle.net/2142/80563

Owning Collections